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Vintage Staedtler 987 19-34 Triangular Drafting Engineering Scale Brazil

Vintage 12" STAEDTLER 987 19-34 Triangular Drafting Architects Scale Ruler

Vintage 12" STAEDTLER MARS 987 19-34 Triangular Drafting Architects Scale Ruler

Staedtler-Mars 12” Triangular Scale Ruler 987 18-34 Engineer Germany Color Bars

Vintage Staedtler Mars 12" Triangular Engineer Ruler / Scale, 987 19-34, JAPAN